We've used Skype. I've used Google Hangouts a long time ago, and found it pretty good. But haven't tried it for a few years.
I haven't really used Zoom personally, but it seems to be the "hot" app right now. That might be a downside though. I've noticed for work that Webex has been much more flaky lately, largely because I think the increase in traffic is overwhelming them. Zoom might have the same issue.
Picking a less trendy app might be a better option. Though that it's on a Saturday evening maybe will help somewhat.